YSI 9500 Photometer - Manual (Page 7)

7
Back Light
The graphic display features a backlight to enhance the display contrast. This
may be switched off to conserve battery power.
Language Options
The photometer can be operated in a number of different languages. When a
particular language is selected, the test names and operating commands will
appear in that language. Certain tests and unit options are provided in
accordance with the conventions of particular countries and are only available
when the photometer is switched to the language concerned. Select the
language required from English, French, German, Spanish or Italian.
Units
Units may be expressed in mg/l, ppm, mmol/l, µmol and g/l.
Sample Number
A unique number may be associated with each result record to identify it in the
log. If Sample Number ‘On’ is selected, the user is offered the choice of
entering a number of up to 10 digits for each sample reading. If this function is
set to ‘Off’, a sample number is automatically allocated.
Sample Number Increment
The sample number increment option may be used to determine whether the
instrument does or does not automatically increment the sample number after
each test. Incrementation of the sample number may be used when the
instrument is used for carrying out a series of similar tests. Alternatively it may
be preferable not to increment the number if typical use involves carrying out a
number of different tests on the same sample.
Dilution Factor
When samples are out of range for the test, a dilution procedure may be used.
If the dilution factor option is set to ‘On’, the instrument will allow entry of a
numerical factor which will be used in the calculation of the result displayed
and stored in the log.
Date and Time
The instrument records the date and time of each reading taken and
associates this with the data record in the log. To correct the date and time on
the internal clock, select the date and time display line.